Early rheumatoid arthritis in African-Americans: the CLEAR Registry.
D000328:Adult; D001741:Black or African American / Q000235:genetics*; D017677:Age Distribution; D000368:Aged; D001172:Arthritis, Rheumatoid / Q000175:diagnosis / Q000208:ethnology* / Q000235:genetics*; D001294:Attitude to Health / Q000208:ethnology; D005260:Female; D006801:Humans; D015994:Incidence; D008297:Male; D008875:Middle Aged; D010147:Pain Measurement; D011379:Prognosis; D016059:Range of Motion, Articular; D012042:Registries; D018570:Risk Assessment; D012720:Severity of Illness Index; D017678:Sex Distribution; D014481:United States / Q000453:epidemiology